Objective To discuss the diagnosis and treatment of carcinoma of renal pelvis ac-companied with kidney stones. Methods Twenty-one cases of carcinoma of renal pelvis with kidney stones were reviewed. The urinary stones history was from 10 d to 24 years with an average of 27 months. Four cases had recurrent fever, weight loss. Seventeen cases had gross hematuria. CT scan-ning was performed in 17 cases, which indicated 9 cases of carcinoma of renal pelvis, 4 cases of possi-ble renal mass and enlarged renal hilum lymph nodes. MRU was performed in 10 cases, which showed 9 cases of stones concomitant with carcinoma of renal pelvis. IVU indicated 13 cases of light filling of contrast and 8 cases of complete negative filling. Nine cases who had been diagnosed before surgery were performed radical nephrectomy and local lymph nodes dissection. Five cases were carried out ne-phrostomy first because of pyonephrosis, then secondary subcapsule nephrectomy was performed, 2 of them who were diagnosed with carcinoma of renal pelvis after surgery were performed with ureterecto-my and excision of bladder cuff. Three cases were performed with subcapsule nephrectomy because of dense perinephric adhesion. Three cases with complicated calculi and nonfunctional kidney were per-formed with nephroureterectomy, 2 of them who were diagnosed with carcinoma of renal pelvis were carried out with ureterectomy and excision of bladder cuff. One case who was performed PCNL under ultrasound guidance was found a mass in the renal pelvis. The pathological examination indicated ade-nocarcinoma. Radical nephrectomy and lymphadenectomy of renal hilum were performed afterwards. Resnlts Twenty-one cases were performed with pathological examination, in which there were 4 ca-ses of transitional cell carcinoma, 16 cases of squamous cell carcinoma and 1 case of adenocarcinoma. All the 21 cases were discharged after surgery. Nine of them were followed up with 4 to 28 months. Six cases were dead. The post-surgery survival time was 3 to 21 months. Two of them died of heart infarction, 4 died of metastasis. Conclusions The carcinoma of renal pelvis should be considered be-fore surgery in the patients with long history of renal calculi, hydronephrosis and infection. CT scan-ning and MRU are helpful for the diagnoses of renal calculi concomitant with carcinoma of renal pel-vis. Earlier diagnosis, earlier management of renal calculi can extend survival time of the patients with renal calculi concomitant with carcinoma of renal pelvis.